Avoid calls to gtk_widget_get_pointer during mouse move if not necessary.  This is to work around janky scrolling behavior that brad was seeing.  I can't repro, so he'll have to tell me if this works for him
Avoid calls to gtk_widget_get_pointer during mouse move if
not necessary.  This is to work around janky scrolling behavior
that brad was seeing.  I can't repro, so he'll have to tell me if
this works for him

BUG=16786

Review URL: http://codereview.chromium.org/160179


git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@21675 0039d316-1c4b-4281-b951-d872f2087c98

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